Edward g



(N0 Modem r E. G. WORLEY.

ELECTRIC BELL.

-No.53,'0,253. Patented D60.4,1894.

the accompanying drawings, and to the letters .mulations of dust or paint or to repair the elevation of the frame hereinafter referred to.

- farther from the wall or board B to which the UNITED STATES EDWARD G. WORLEY,

PATENT OFFICE.

OF NEW YORK, N. Y.

ELECTRIC BELL.

SPECIFICATION forming part of Letters Patent No. 530,253, dated December 4,1 894.

Application filed June 13, 1894.

To 00% whom it may concern:

Be it known that I, EDWARD G. WORLEY, of the city, county, and State of New York, have invented certain new and usefulImprovements in Electric Bells; and I do hereby declare that the following is a full, and exact description thereof, reference being had to of reference marked thereon, making a part of this specification.

This invention relates to electric call bells which are commonly used for house work and its main object is to so construct the bell with its casing as a whole, that all of its parts may be effectually protected against dust, insects, paint, white-wash, 850., without interference with the sound of the gong, thereby making it possible to leave the bell in position without attention for long periods of time, whereas, the bells now commonly used require often to be taken down or taken apart to remove accuravages of insects on insulation.

Incidentally to this main object other improvements have been made in various features of constructionand arrangement, all as set forth more particularly hereinafter.

In'the accompanying drawings: Figure 1 is a front elevation of a complete bell ready for use. Fig. 2 is a front elevation of the same with the coverremoved. Fig. 3 isa vertical section on the line 00-00 of Fig.2. Fig. 4 is an All parts of the mechanism of the bell, including the gong itself, are inclosed within and secured to a casing which itself forms a part of the structure of the complete bell.

The casing in general outline is adapted to cover and protect the other parts referred to and consists of a main portion A which is adapted to inclose snugly the electro magnet and other parts of the hammer actuating devices, and an offset A which has its bottom in a differentplane from the rear or bottom 7 of the main portion, so that it may stand out bell is secured. The olfset is preferably adapted to inclose the gong O snugly and its rear or bottom is formed with an opening or openings, as at a, a. A flange a is preferably left around the openings at, a, with a bar 0. extending across or between the openings.

Serial No. 514.418- (No model.)

Feet a may be formed on the rear or bottom of the main portion A and ears a may be formed on the sides thereof to receive the screws by which the bell is secured in position. The openings at in the rear or bottom of the ofiset A are covered by a screen D, preferably of fine wire gauze, which will pre vent the access of dust, or of insects to the inside of the casing, and, being itself placed at the rear or under side of the casing, it is not likely to be broken by accidental blows.

As hereinafter described, the casing is completely and tightly inclosed except for these screen openings, thereby effectually exclud ing all injurious substances and permitting the bell to remain in position indefinitely Without the necessity of cleaning while at the same time the outward passage of the sound waves is not interfered with.

The screen D is preferably laid against the inside of the flange a and is held in place by a skeleton frame E, Fig. 4, which is applied inside of the screen and is held to clamp the latter against the flange by a screw 0 which passes through the gong 0, through an intermediate sleeve c' and through the frame E and screen D into the bar a A binding screw o is provided for the connection of one conductor directly to the casing and another binding screw a for the connection of the other conductor. An adjusting screw is also threaded into the side wall of the casing fora purpose hereinafter referred to, but with the exception of this adjusting screw and of the two binding screws no parts of the bell are exposed outside of the casing.

The electro magnet F is mounted directly upon the bottom of the main portion A of the casing andits coils are connected to the'one side by an insulated conductorf to the binding post a and on the other side by an insulated conductor f to a post f which is secured to the bottom of the casing but not in electrical contact therewith and supports the back contact hereinafter referred to.

The armature G carries as usual the hammer G and is connected to a sleeve g which has a bearing on a headed post H which is secured to the bottom of the casing A in electrical contact therewith. It sometimes happens that the electrical contact between the post H and the sleeve g is not perfect, as it should be. In order, therefore, that a good contact shall be certain atall times I interpose between the head of the post II and the sleeve 9 a light spring 72 which bears always 5 at one end against the sleeve and at the other end against the head of the post II. It may also be desirable to solder the respective ends of the spring to the post and to the sleeve, as at 7a. The spring is so light as not to interro fore in any degree'with the free movement of the armature G but at the same time it maintains the continuity of the path for the current from the post to the armature.

Usually a tension spring is applied to the t5 armature to draw it away from the magnet but as my main object is to permit the bell to be used for a very long period without attention, and as a spring is apt to loose its elasticity and to require adjustment I prefer to attach to the sleeve 9 a horizontal arm g and to apply thereto an adjusting weight g which, being once set, requires no further attention.

The back contact for the armature is formed as a flat spring I which is secured to the post f before referred to, and is bent as repre sented so that its endt' may bear upon the armature G at the proper point in the make and break of the circuit. A second spring J which, as represented, may be a part of the first, is adapted to bear upon the spring I and to be pressed upon the same more or less by the adjusting screw K before referred to to regulate the action of the make and break de- 3 5 Vices as required.

In front of the back contact spring I and between it and the armature G is fixed an insulated post L which constitutes a stop for the spring I as it follows the armature in the 40 movement of the lattertoward the poles of the magnet F, thereby insuring the proper breaking of the circuit between the back contact and the armature.

The mode of operation of the bell will be 5 readily understood without further description, and it will be clear from the description already given that when the parts of the hell have been assembled and set up, no further attention or adjustment will be required and that it will not be necessary to remove the bell from its position of use or to open it. The cover M which extends over the entire front of the casing, (being secured thereto by a screw m) and incloses the gong and hammer as well as the magnet, protects all parts of the bell from injury by blows and may be painted over if desired without danger of loading the hammer with paint or of introducing paint or other substance to interfere with the proper action of the hell. 6::

I claim as my invention-- 1. In an electric signaling device, the combination of an open casing having a main portion to inclose the hammer actuating devices and having an offset with its rear or bottom on a different plane from the rear or bottom of the main portion, the rear or bottom of said ofiset being open with a bar across the opening, a screen covering said opening, a gong supported on said bar, and a cover and means to secure it in place on said casing, substantially as shown and described.

2. In. an electric signaling device, the combination of an open casing havinga main portion to inclose the hammer actuating devices and having an offset with its rear or bottom on a different plane from the rear or bottom of the main portion, the rear or bottom of said ofiset being open with a bar across the opening, a screen covering said opening, and open frame laid over said screen, a gong, a screw passing through said gong, a bar and screen into said frame to bind all together, and a cover for the casing and means to secure it in place, substantially as shown and described.

3. In an electric signaling device, the com bination of a casing, a magnet, an armature and hammer, a back contact-spring supported on said casing but insulated therefrom and connected with the coilsof the magnet, an insulated stop supported on the casing in front of said spring, an adjusting screw mounted in the casing and having an insulated point to bear on the spring, and connections for the conductors, substantially as shown and de- 5 scribed.

4. In an electric signaling device, the combination of a casing, means for connecting one of the conductors thereto, a magnet, means for connecting the other conductor to its coils, a headed post mounted on the casing, an armature and hammer havinga sleeve bearing on said post, a spiral spring interposed between the head of the post and the sleeve to insure electrical contact, and a back [0 5 contact insulated from the casing and connected to the coils of the magnet, substantially as shown and described.

In testimony whereof I have signed my name to this specification in the presence of r [0 two subscribing witnesses.

EDWARD Gr. WORLEY.

Witnesses:

A. N. JESBERA, A. WIDDER. 

